use Test::More tests => 17;
use strict;
use warnings;

BEGIN {
    use FindBin;
    use lib "$FindBin::Bin/../lib";
}

use List::Util qw(first sum);
use Slic3r;
use Slic3r::Geometry qw(epsilon);
use Slic3r::Test;

{
    my $config = Slic3r::Config->new_from_defaults;
    $config->set('skirts', 0);
    $config->set('perimeters', 0);
    $config->set('solid_infill_speed', 99);
    $config->set('top_solid_infill_speed', 99);
    $config->set('bridge_speed', 72);
    $config->set('first_layer_speed', '100%');
    $config->set('cooling', 0);
    
    my $test = sub {
        my ($conf) = @_;
        $conf ||= $config;
        
        my $print = Slic3r::Test::init_print('20mm_cube', config => $config);
        
        my %z = ();                            # Z => 1
        my %layers_with_solid_infill    = ();  # Z => $count
        my %layers_with_bridge_infill   = ();  # Z => $count
        Slic3r::GCode::Reader->new->parse(Slic3r::Test::gcode($print), sub {
            my ($self, $cmd, $args, $info) = @_;
            
            if ($self->Z > 0) {
                $z{ $self->Z } = 1;
                if ($info->{extruding} && $info->{dist_XY} > 0) {
                    my $F = $args->{F} // $self->F;
                    $layers_with_solid_infill{$self->Z} = 1
                        if $F == $config->solid_infill_speed*60;
                    $layers_with_bridge_infill{$self->Z} = 1
                        if $F == $config->bridge_speed*60;
                }
            }
        });
        my @z = sort { $a <=> $b } keys %z;
        my @shells = map $layers_with_solid_infill{$_} || $layers_with_bridge_infill{$_}, @z;
        fail "insufficient number of bottom solid layers"
            unless !defined(first { !$_ } @shells[0..$config->bottom_solid_layers-1]);
        fail "excessive number of bottom solid layers"
            unless scalar(grep $_, @shells[0 .. $#shells/2]) == $config->bottom_solid_layers;
        fail "insufficient number of top solid layers"
            unless !defined(first { !$_ } @shells[-$config->top_solid_layers..-1]);
        fail "excessive number of top solid layers"
            unless scalar(grep $_, @shells[($#shells/2)..$#shells]) == $config->top_solid_layers;
        if ($config->top_solid_layers > 0) {
            fail "unexpected solid infill speed in first solid layer over sparse infill"
                if $layers_with_solid_infill{ $z[-$config->top_solid_layers] };
            die "bridge speed not used in first solid layer over sparse infill"
                if !$layers_with_bridge_infill{ $z[-$config->top_solid_layers] };
        }
        1;
    };
    
    $config->set('top_solid_layers', 3);
    $config->set('bottom_solid_layers', 3);
    ok $test->(), "proper number of shells is applied";
    
    $config->set('top_solid_layers', 0);
    $config->set('bottom_solid_layers', 0);
    ok $test->(), "no shells are applied when both top and bottom are set to zero";
    
    $config->set('fill_density', 0);
    ok $test->(), "proper number of shells is applied even when fill density is none";
}

# issue #1161
{
    my $config = Slic3r::Config->new_from_defaults;
    $config->set('layer_height', 0.3);
    $config->set('first_layer_height', '100%');
    $config->set('bottom_solid_layers', 0);
    $config->set('top_solid_layers', 3);
    $config->set('cooling', 0);
    $config->set('bridge_speed', 99);
    $config->set('solid_infill_speed', 99);
    $config->set('top_solid_infill_speed', 99);
    $config->set('first_layer_speed', '100%');
    
    my $print = Slic3r::Test::init_print('V', config => $config);
    my %layers_with_solid_infill = ();  # Z => 1
    Slic3r::GCode::Reader->new->parse(Slic3r::Test::gcode($print), sub {
        my ($self, $cmd, $args, $info) = @_;
        
        $layers_with_solid_infill{$self->Z} = 1
            if $info->{extruding} && ($args->{F} // $self->F) == $config->solid_infill_speed*60;
    });
    is scalar(map $layers_with_solid_infill{$_}, grep $_ <= 7.2, keys %layers_with_solid_infill), 3,
        "correct number of top solid shells is generated in V-shaped object";
}

{
    my $config = Slic3r::Config->new_from_defaults;
    # we need to check against one perimeter because this test is calibrated
    # (shape, extrusion_width) so that perimeters cover the bottom surfaces of
    # their lower layer - the test checks that shells are not generated on the
    # above layers (thus 'across' the shadow perimeter)
    # the test is actually calibrated to leave a narrow bottom region for each
    # layer - we test that in case of fill_density = 0 such narrow shells are 
    # discarded instead of grown
    $config->set('perimeters', 1);
    $config->set('fill_density', 0);
    $config->set('cooling', 0);                 # prevent speed alteration
    $config->set('first_layer_speed', '100%');  # prevent speed alteration
    $config->set('layer_height', 0.4);
    $config->set('first_layer_height', '100%');
    $config->set('extrusion_width', 0.55);
    $config->set('bottom_solid_layers', 3);
    $config->set('top_solid_layers', 0);
    $config->set('solid_infill_speed', 99);
    
    my $print = Slic3r::Test::init_print('V', config => $config);
    my %layers = ();  # Z => 1
    Slic3r::GCode::Reader->new->parse(Slic3r::Test::gcode($print), sub {
        my ($self, $cmd, $args, $info) = @_;
        $layers{$self->Z} = 1
            if $info->{extruding} && ($args->{F} // $self->F) == $config->solid_infill_speed*60;
    });
    is scalar(keys %layers), $config->bottom_solid_layers,
        "shells are not propagated across perimeters of the neighbor layer";
}

{
    my $config = Slic3r::Config->new_from_defaults;
    $config->set('perimeters', 3);
    $config->set('cooling', 0);                 # prevent speed alteration
    $config->set('first_layer_speed', '100%');  # prevent speed alteration
    $config->set('layer_height', 0.4);
    $config->set('first_layer_height', '100%');
    $config->set('bottom_solid_layers', 3);
    $config->set('top_solid_layers', 3);
    $config->set('solid_infill_speed', 99);
    $config->set('top_solid_infill_speed', 99);
    
    my $print = Slic3r::Test::init_print('sloping_hole', config => $config);
    my %solid_layers = ();  # Z => 1
    Slic3r::GCode::Reader->new->parse(Slic3r::Test::gcode($print), sub {
        my ($self, $cmd, $args, $info) = @_;
        $solid_layers{$self->Z} = 1
            if $info->{extruding} && ($args->{F} // $self->F) == $config->solid_infill_speed*60;
    });
    is scalar(keys %solid_layers), $config->bottom_solid_layers + $config->top_solid_layers,
        "no superfluous shells are generated";
}

{
    my $config = Slic3r::Config->new_from_defaults;
    $config->set('perimeters', 1);
    $config->set('fill_density', 0);
    $config->set('top_solid_layers', 0);
    $config->set('spiral_vase', 1);
    $config->set('bottom_solid_layers', 0);
    $config->set('skirts', 0);
    $config->set('first_layer_height', '100%');
    $config->set('start_gcode', '');
    
    # TODO: this needs to be tested with a model with sloping edges, where starting
    # points of each layer are not aligned - in that case we would test that no
    # travel moves are left to move to the new starting point - in a cube, end
    # points coincide with next layer starting points (provided there's no clipping)
    my $test = sub {
        my ($model_name, $description) = @_;
        my $print = Slic3r::Test::init_print($model_name, config => $config);
        my $travel_moves_after_first_extrusion = 0;
        my $started_extruding = 0;
        my @z_steps = ();
        Slic3r::GCode::Reader->new->parse(Slic3r::Test::gcode($print), sub {
            my ($self, $cmd, $args, $info) = @_;
            
            if ($cmd eq 'G1') {
                $started_extruding = 1 if $info->{extruding};
                push @z_steps, $info->{dist_Z}
                    if $started_extruding && $info->{dist_Z} > 0;
                $travel_moves_after_first_extrusion++
                    if $info->{travel} && $started_extruding && !exists $args->{Z};
            }
        });
        
        # we allow one travel move after first extrusion: i.e. when moving to the first
        # spiral point after moving to second layer (bottom layer had loop clipping, so
        # we're slightly distant from the starting point of the loop)
        ok $travel_moves_after_first_extrusion <= 1, "no gaps in spiral vase ($description)";
        ok !(grep { $_ > $config->layer_height + epsilon } @z_steps), "no gaps in Z ($description)";
    };
    
    $test->('20mm_cube', 'solid model');
    
    $config->set('z_offset', -10);
    $test->('20mm_cube', 'solid model with negative z-offset');
    
    ### Disabled because the current unreliable medial axis code doesn't
    ### always produce valid loops.
    ###$test->('40x10', 'hollow model with negative z-offset');
}

{
    my $config = Slic3r::Config->new_from_defaults;
    $config->set('spiral_vase', 1);
    $config->set('perimeters', 1);
    $config->set('fill_density', 0);
    $config->set('top_solid_layers', 0);
    $config->set('bottom_solid_layers', 0);
    $config->set('retract_layer_change', [0]);
    $config->set('skirts', 0);
    $config->set('first_layer_height', '100%');
    $config->set('layer_height', 0.4);
    $config->set('start_gcode', '');
    $config->validate;
    
    my $print = Slic3r::Test::init_print('20mm_cube', config => $config);
    my $z_moves = 0;
    my @this_layer = ();  # [ dist_Z, dist_XY ], ...
    
    my $bottom_layer_not_flat = 0;
    my $null_z_moves_not_layer_changes = 0;
    my $null_z_moves_not_multiples_of_layer_height = 0;
    my $sum_of_partial_z_equals_to_layer_height = 0;
    my $all_layer_segments_have_same_slope = 0;
    my $horizontal_extrusions = 0;
    
    Slic3r::GCode::Reader->new->parse(Slic3r::Test::gcode($print), sub {
        my ($self, $cmd, $args, $info) = @_;
        
        if ($cmd eq 'G1') {
            if ($z_moves < 2) {
                # skip everything up to the second Z move
                # (i.e. start of second layer)
                if (exists $args->{Z}) {
                    $z_moves++;
                    $bottom_layer_not_flat = 1
                        if $info->{dist_Z} > 0 && $info->{dist_Z} != $config->layer_height;
                }
            } elsif ($info->{dist_Z} == 0 && $args->{Z}) {
                $null_z_moves_not_layer_changes = 1
                    if $info->{dist_XY} != 0;
                
                # % doesn't work easily with floats
                $null_z_moves_not_multiples_of_layer_height = 1
                    if abs(($args->{Z} / $config->layer_height) * $config->layer_height - $args->{Z}) > epsilon;
                
                my $total_dist_XY = sum(map $_->[1], @this_layer);
                $sum_of_partial_z_equals_to_layer_height = 1
                    if abs(sum(map $_->[0], @this_layer) - $config->layer_height) > epsilon;
                
                foreach my $segment (@this_layer) {
                    # check that segment's dist_Z is proportioned to its dist_XY
                    $all_layer_segments_have_same_slope = 1
                        if abs($segment->[0]*$total_dist_XY/$config->layer_height - $segment->[1]) > 0.1;
                }
                
                @this_layer = ();
            } elsif ($info->{extruding} && $info->{dist_XY} > 0) {
                $horizontal_extrusions = 1
                    if $info->{dist_Z} == 0;
                push @this_layer, [ $info->{dist_Z}, $info->{dist_XY} ];
            }
        }
    });
    ok !$bottom_layer_not_flat, 'bottom layer is flat when using spiral vase';
    ok !$null_z_moves_not_layer_changes, 'null Z moves are layer changes';
    ok !$null_z_moves_not_multiples_of_layer_height, 'null Z moves are multiples of layer height';
    ok !$sum_of_partial_z_equals_to_layer_height, 'sum of partial Z increments equals to a full layer height';
    ok !$all_layer_segments_have_same_slope, 'all layer segments have the same slope';
    ok !$horizontal_extrusions, 'no horizontal extrusions';
}

{
    my $config = Slic3r::Config->new_from_defaults;
    $config->set('perimeters', 1);
    $config->set('fill_density', 0);
    $config->set('top_solid_layers', 0);
    $config->set('spiral_vase', 1);
    $config->set('bottom_solid_layers', 0);
    $config->set('skirts', 0);
    $config->set('first_layer_height', '100%');
    $config->set('start_gcode', '');
    
    my $print = Slic3r::Test::init_print('two_hollow_squares', config => $config);
    my $diagonal_moves = 0;
    Slic3r::GCode::Reader->new->parse(Slic3r::Test::gcode($print), sub {
        my ($self, $cmd, $args, $info) = @_;
        
        if ($cmd eq 'G1') {
            if ($info->{extruding} && $info->{dist_XY} > 0) {
                if ($info->{dist_Z} > 0) {
                    $diagonal_moves++;
                }
            }
        }
    });
    is $diagonal_moves, 0, 'no spiral moves on two-island object';
}

__END__